Metallics Machine Screw 1/4-20...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$50.23
$25.88
Metallics 1/4-20 x 1-1/4 in. Round Head Combo Machine Screws - Steel Zinc - 100qty

Metallics Machine Screw 1/4-20 x 1-1/4" Round Head Combo Drive Steel Zinc, 100 Pack

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Model: JRM102
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$50.23
$25.88
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Metallics Industries Machine Screw 1/4-20 x 1-1/4" Round Head Combo Drive Steel Zinc

Professional Fastener Solution with Dual Drive Technology

The Metallics Industries Machine Screw 1/4-20 x 1-1/4" delivers exceptional performance and reliability for electrical, plumbing, and HVAC applications. This steel zinc machine screw provides dependable fastening solutions designed for professional contractors, electricians, and industrial technicians, offering the proven quality and precision engineering that professionals trust from a leading manufacturer of electrical hardware and industrial fasteners.

Professional Features & Benefits

Dual Drive Performance

  • Combo Drive Technology - Features both slotted and Phillips drive options in one head for maximum installation flexibility and tool compatibility
  • 1/4-20 Thread Specification - Precision 20 threads per inch provide secure engagement and reliable holding power for professional applications
  • 1-1/4" Length Design - Optimal length for standard electrical and mechanical assembly applications with proper thread engagement
  • Round Head Profile - Professional round head design with 0.443-0.472" width provides excellent bearing surface and finished appearance

Material & Construction Excellence

  • Steel Zinc Construction - AISI 1006-1022 steel with zinc finish provides superior corrosion resistance and durability
  • Professional Hardness Rating - Rockwell B70-B100 hardness ensures optimal strength without brittleness for reliable performance
  • 60,000 PSI Minimum Tensile Strength - Engineered for demanding applications requiring high strength and reliability

Installation Versatility

  • Dual Tool Compatibility - Works with both slotted and Phillips #3 drivers for maximum installation convenience
  • Precision Threading - Machine thread design ensures consistent engagement with threaded holes and nuts

Technical Specifications

Thread Size: 1/4-20, Length: 1-1/4", Head Type: Round, Drive Type: Slotted/Phillips Combo, Driver Size: #3, Material: Steel Zinc (AISI 1006-1022), Finish: Zinc, Head Width: 0.443-0.472", Head Height: 0.16-0.175", Hardness: Rockwell B70-B100, Tensile Strength: 60,000 PSI minimum, Phillips Recess Depth: 0.121-0.147", Phillips Recess Diameter: 0.255-0.268", Slot Depth: 0.082-0.109", Slot Width: 0.064-0.075", Pack Type: Jar, Weight: 1.775 lbs

Installation & Usage

  1. Select appropriate driver tool - either slotted or Phillips #3 screwdriver based on installation preference
  2. Align screw with pre-threaded hole or nut ensuring proper thread engagement
  3. Begin threading by hand to prevent cross-threading and ensure proper alignment
  4. Use driver tool to tighten screw, applying consistent torque for secure fastening
  5. Verify proper seating of round head against mounting surface for optimal load distribution
  6. Check final tightness to ensure secure connection without over-torquing

Professional Applications

Ideal for:

  • Electrical Panel Assembly - Securing components, switches, and hardware in electrical enclosures and control panels
  • Equipment Mounting - Fastening electrical devices, junction boxes, and conduit accessories to mounting surfaces
  • HVAC System Installation - Assembling ductwork components, mounting brackets, and system hardware
  • Plumbing Applications - Securing pipe supports, fixture mounting, and plumbing hardware assembly
  • Industrial Machinery - Machine assembly, equipment maintenance, and component replacement applications
  • Control System Mounting - Installing sensors, switches, and control devices in industrial environments
  • Maintenance Operations - Equipment servicing, component replacement, and system upgrades
  • Commercial Construction - General fastening applications in commercial and industrial building projects

Steel Zinc Construction Advantage

The steel zinc construction provides exceptional durability and corrosion resistance for demanding professional applications. The AISI 1006-1022 steel base material offers excellent strength characteristics, while the zinc finish provides reliable protection against environmental factors. This combination ensures long-lasting performance in electrical, plumbing, and HVAC installations where reliability is critical.

Why Choose Metallics Industries Quality?

Metallics Industries pioneered combo drive technology in 1985, becoming the first fastener company in America to offer a complete line of combination drive screws. Our commitment to precision manufacturing, quality materials and finishes, and reliable performance for contractors and industrial professionals is backed by comprehensive product testing and decades of engineering excellence. Trust Metallics Industries for proven solutions in electrical, plumbing, HVAC, and construction applications where professional-grade fasteners make the difference.

Manufacturer Resources

Product Specs

Minimum Purchase:
100 units
Arra Compliant:
N
Buy American Compliant:
No
Country Of Origin:
MUL
Division:
Electrical H1
Drive Type:
Slotted/Phillips
Driver Size:
#3
Fastener Head Height:
0.16 - 0.175 in.
Fastener Head Type:
Round
Fastener Head Width:
0.443 - 0.472 in.
Fastener Length:
1/1/04
Field Application:
Electrical, Plumbing, Heating and Air Conditioning Industries
Hardness:
Rockwell B70-B100
Language Code:
EN
Material Standard:
AISI 1006 - 1022
Neurspe:
https://ideadigitalasset.com/DAMRoot/Original/10035/11237_ID-SPE-v1-ID-SPE-v1-Round_Head_Machine_Screw.pdf
Order Minimum Imperial:
100
Order Minimum Uom Imperial:
JR
Pack Type:
Jar
Phillips Recess Depth:
0.121 - 0.147
Phillips Recess Diameter:
0.255 - 0.268
Phillips Recess Width:
0.034
Product Family:
Electrical Supplies
Product Height:
3.6 in
Product Length:
3 in
Product Weight:
1.775 lbs
Product Width:
3 in
Recess Penetration Gaging Depth:
0.104 - 0.130
Slot Depth:
0.082 - 0.109
Slot Width:
0.064 - 0.075
Sub Division:
Electrical-E H2
Tensile Strength:
60000 psi minimum
Thread Per Inch:
20
Product Type:
Machine Screw
Product Group:
Fasteners
Department:
Electrical
Product Subgroup:
Screws
Type2:
Machine Screw
Series:
JRM
Product Finish:
Zinc
Product Details:
Machine Screw
Product Material:
Steel Zinc

Metallics JRM102 – Frequently Asked Questions

1) Can I drive the Metallics JRM102 machine screw with a Phillips bit, or does it need a slotted driver?
Either works. The JRM102 has a combo head, slotted and Phillips in the same recess, so whichever driver is already in your hand will turn it. For the Phillips side use a #3 bit, not a #2, since the recess measures 0.255 to 0.268 inch across and a smaller bit will cam out. The slot runs 0.064 to 0.075 inch wide and 0.082 to 0.109 inch deep, which suits a standard cabinet-tip flat blade.
2) Will a 1/4-20 machine screw thread into a standard threaded hole in an electrical enclosure or strut nut?
Yes, provided the hole or nut is tapped 1/4-20. This is a machine thread at 20 threads per inch, so it mates with any 1/4-20 tapped hole, nut, or channel nut. It will not cut its own threads in sheet metal the way a self-tapper does, so the hole has to be pre-tapped or you need a nut behind it.
3) Does this Metallics machine screw meet Buy American or ARRA requirements for a government job?
No. The JRM102 is not Buy American compliant and is not ARRA compliant, and its country of origin is listed as multiple. On a federally funded job with domestic sourcing language in the spec, this screw will not satisfy it.
4) How much material can a 1-1/4 inch long 1/4-20 machine screw actually fasten through?
The 1-1/4 inch shank is measured under the round head, so the usable grip is 1-1/4 inch minus whatever thread engagement you need on the far side. For a 1/4-20 in a steel nut or tapped plate, figure roughly 1/4 inch of engagement, leaving about an inch of stack you can clamp. Round head screws bear on the surface rather than sinking in, so no counterbore depth needs to be subtracted.
5) Is a round head machine screw going to sit flush, or will it stand proud of the panel?
It stands proud. The round head is a domed bearing head, 0.443 to 0.472 inch across and 0.16 to 0.175 inch tall, sitting entirely on top of the surface. If you need the fastener flush with the face of the panel or under a sliding cover, you want a flat head in a countersunk hole instead. Where the domed head helps is spreading load over a thin bracket or slotted hole.
6) Are zinc plated steel machine screws OK outdoors or in a damp mechanical room?
Zinc over steel is a mild corrosion coating, fine for indoor panels, control cabinets, duct work and damp mechanical spaces, but it is not stainless. For direct weather exposure, washdown areas, or anywhere salt is present, specify stainless. The base steel here is AISI 1006 to 1022 with a zinc finish.
7) How strong is this screw, and can I torque it down hard?
Rated at 60,000 psi minimum tensile with a Rockwell B70 to B100 hardness, this is standard low carbon commercial fastener strength, roughly the level of an unmarked or Grade 2 class screw. It handles panel, bracket and duct assembly fine. It is not a high strength structural bolt, so do not substitute it where a Grade 5 or Grade 8 is called out on a drawing, and do not lean on it with an impact driver.
8) How many screws come in a jar of Metallics JRM102?
100 screws per jar, and that jar is the minimum order quantity. The filled jar weighs 1.775 lbs. Jar packaging suits a van stock or a shop bench where you are pulling a handful at a time rather than a bulk box.
9) Do 1/4-20 combo round head machine screws come with nuts or washers?
No. The jar contains 100 screws only. If you are fastening through an untapped hole you will need to source 1/4-20 nuts separately, plus flat or lock washers if the joint sees vibration.
How fast can I get the Metallics JRM102 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Metallics JRM102 come with a warranty?
Absolutely. The Metallics JRM102 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Metallics JRM102?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Metallics JRM102 from ZenSupply?
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