Metallics 3/8-16 x 1 in. Round...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$56.07
$5.53
Metallics JSRM138P 3/8-16 x 1 in. Round Head Phillips Machine Screws - 18-8 Stainless - 100qty

Metallics 3/8-16 x 1 in. Round Head Phillips Machine Screws - 18-8 Stainless Steel

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Model: JSRM138P
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$56.07
$5.53
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Metallics 3/8-16 x 1 in. Round Head Phillips Machine Screws - 18-8 Stainless Steel

Professional Grade Fastening Solutions for Electrical Applications

Metallics delivers reliable fastening performance with these precision-engineered 3/8-16 x 1 in. round head Phillips machine screws. Constructed from 18-8 stainless steel material, these professional-grade fasteners provide corrosion resistance and durability for electrical, plumbing, heating and air conditioning applications. Each screw features a round head design with Phillips drive for secure installation and consistent performance.

Professional Features & Benefits

  • 18-8 Stainless Steel Construction: Provides excellent corrosion resistance and long-lasting durability in demanding environments.
  • 3/8-16 Thread Specification: Delivers precise threading compatibility with standard electrical and mechanical applications.
  • Round Head Phillips Drive: Ensures secure grip and consistent torque application during installation with #4 driver size.
  • 1 Inch Length: Optimal sizing for standard mounting and fastening requirements across multiple applications.
  • 80000 psi Minimum Tensile Strength: Provides reliable holding power and structural integrity under load conditions.
  • Rockwell B85-B95 Hardness: Maintains optimal balance between strength and workability for professional installations.

Technical Specifications

  • Arra Compliant: N
  • Buy American Compliant: No
  • Country Of Origin: MUL
  • Department: Electrical
  • Division: Electrical H1
  • Drive Type: Phillips
  • Driver Size: #4
  • Fastener Head Height: 0.237 - 0.256 in.
  • Fastener Head Type: Round
  • Fastener Head Width: 0.67 - 0.708 in.
  • Fastener Length: 1
  • Field Application: Electrical, Plumbing, Heating and Air Conditioning Industries
  • Hardness: Rockwell B85-B95
  • Height: 5.75 in
  • Language Code: EN
  • Material: 18-8 Stainless
  • Material Standard: SAE
  • 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: 0.202 - 0.228
  • Phillips Recess Diameter: 0.374 - 0.387
  • Phillips Recess Width: 0.064
  • Product Details: Machine Screw
  • Product Family: Electrical Supplies
  • Product Group: Fasteners
  • Product Height: 146.05 MM
  • Product Length: 3.5 in
  • Product Subgroup: Screws
  • Product Type: Machine Screw
  • Product Weight: 1914 g
  • Product Width: 88.9 MM
  • Recess Penetration Gaging Depth: 0.182 - 0.208
  • Series: SRM
  • Sub Division: Electrical-E H2
  • Tensile Strength: 80000 psi minimum
  • Thread Per Inch: 16
  • Type2: Machine Screw
  • Weight: 4.22 lbs
  • Width: 3.5 in

Professional Applications

  • Electrical Panel and Equipment Mounting
  • Plumbing System Installations
  • HVAC Equipment Assembly
  • Commercial Facility Maintenance
  • Industrial Equipment Fastening
  • Mechanical System Components

Why Choose Metallics Quality?

Metallics machine screws deliver consistent performance with precision-engineered specifications and 18-8 stainless steel construction. The SAE material standard ensures reliable quality, while the 80000 psi minimum tensile strength provides dependable holding power for professional electrical, plumbing, and HVAC applications.

Manufacturer Resources

Product Specs

Minimum Purchase:
100 units
Arra Compliant:
N
Buy American Compliant:
No
Division:
Electrical H1
Drive Type:
Phillips
Driver Size:
#4
Fastener Head Height:
0.237 - 0.256 in.
Fastener Head Type:
Round
Fastener Head Width:
0.67 - 0.708 in.
Fastener Length:
1
Field Application:
Electrical, Plumbing, Heating and Air Conditioning Industries
Hardness:
Rockwell B85-B95
Language Code:
EN
Material Standard:
SAE
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:
0.202 - 0.228
Phillips Recess Diameter:
0.374 - 0.387
Phillips Recess Width:
0.064
Product Group:
Fasteners
Product Height:
5.75 in
Product Length:
3.5 in
Product Weight:
4.22 lbs
Product Width:
3.5 in
Recess Penetration Gaging Depth:
0.182 - 0.208
Sub Division:
Electrical-E H2
Tensile Strength:
80000 psi minimum
Thread Per Inch:
16
Department:
Electrical
Product Subgroup:
Screws
Product Type:
Machine Screw
Type2:
Machine Screw
Series:
SRM
Product Details:
Machine Screw
Product Material:
18-8 Stainless

Metallics JSRM138P – Frequently Asked Questions

1) Will a Metallics JSRM138P 3/8-16 machine screw thread into a 3/8-16 tapped hole or standard 3/8 coarse nut?
Yes. The JSRM138P is cut 3/8-16, that is 16 threads per inch, which is the standard UNC coarse pitch for 3/8 inch diameter. It mates with any 3/8-16 tapped hole, 3/8 coarse nut, or 3/8-16 strut channel nut. If the hole you are threading into is 3/8-24 fine, this screw will not go in.
2) How much material can a 1 inch long 3/8-16 round head machine screw actually grip?
Length is 1 inch, measured under the round head, so the full inch is usable grip plus thread engagement. Figure your material stack plus enough thread into the nut or tapped hole to equal 1 inch. The round head adds 0.237 to 0.256 inch of height above the surface, which does not count toward grip but does matter if anything has to sit flush over it.
3) Do these stainless machine screws qualify for a Buy American or ARRA-funded project?
No. The Metallics JSRM138P is listed as not Buy American compliant and not ARRA compliant, with multiple countries of origin. If your government, school, or transit job carries a domestic-content requirement, this is not the fastener to submit.
4) Are 18-8 stainless machine screws OK for outdoor or damp locations like rooftop HVAC and wet-location panels?
18-8 stainless is the usual choice for damp and outdoor mechanical work, and that is what these screws are made from, so corrosion resistance is far better than plated steel on a rooftop curb, a pump room, or a wet-location enclosure. In chloride-heavy coastal or pool-chemical environments 316 stainless holds up better than 18-8.
5) Is 80,000 psi tensile strength enough for hanging HVAC or electrical equipment with 3/8 inch screws?
These screws are rated 80,000 psi minimum tensile, with Rockwell B85-B95 hardness, which is typical for 18-8 stainless and lower than a hardened Grade 5 or Grade 8 steel bolt. That is fine for panel mounting, equipment assembly, and bracket fastening. For structural or rated overhead suspension loads, use the hardened or rod-and-hanger hardware your engineer specified instead of a stainless machine screw.
6) How are these Metallics 3/8-16 screws packaged, and what is the smallest quantity I can order?
They ship in a jar, 100 pieces, and 100 is the order minimum. One jar weighs 4.22 lbs. Good for stocking a shop or a service van rather than buying a handful loose.
7) Do I need to order nuts and washers separately with these machine screws?
Yes, the jar contains screws only. For a through-bolted connection you will need 3/8-16 nuts and, if you want to match the corrosion resistance, 18-8 stainless flat washers and nuts rather than plated steel. Mixing plated steel nuts onto stainless screws in a damp location gives you galvanic corrosion at the joint.
8) Should I use a round head or a flat head machine screw for mounting equipment in an enclosure?
Round head, which is what these are, sits proud of the surface and bears on a flat, unchamfered hole, so it is the right pick for drilled plate, strut, and sheet metal where there is no countersink. Flat head needs a countersunk or chamfered hole to pull in flush and is for places where nothing can protrude. With 0.237 to 0.256 inch of head height here, leave clearance if a cover or gasket closes over it.
How fast can I get the Metallics JSRM138P 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 JSRM138P come with a warranty?
Absolutely. The Metallics JSRM138P 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 JSRM138P?
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 JSRM138P from ZenSupply?
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