Metallics JTSF21 8 x 1 in. Fla...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$50.13
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Metallics JTSF21 8 x 1 in. Flat Head Phillips Tapping Screws - Steel Zinc - 100qty

Metallics JTSF21 8 x 1 in. Flat Head Phillips Tapping Screws - Steel Zinc - Each

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Model: JTSF21
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$50.13
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8 x 1 in. Flat Head Phillips Tapping Screws - Steel Zinc - 100qty

  • Additional Notes

    • Other sizes and quantities available by request | Dimensions for #9 diameter are independent of ASME B18.6.4

  • Features

    • Steel Zinc Material
    • 8 Diameter, 1" Length
    • Flat head with Phillips Drive

Manufacturer Resources

Product Specs

Minimum Purchase:
100 units
Arra Compliant:
N
Buy American Compliant:
No
Country Of Origin:
MUL
Dimensional Standard:
ASME B18.6.4-1998
Division:
Electrical H1
Drive Type:
Phillips
Driver Size:
#2
Fastener Head Height:
0.084 - 0.1 in.
Fastener Head Type:
Flat
Fastener Head Width:
0.285 - 0.312 in.
Fastener Length:
1
Field Application:
Electrical, Plumbing, Heating and Air Conditioning Industries
Gaging Diameter:
0.267
Hardness:
Rockwell C28-38
Language Code:
EN
Material Standard:
AISI 1016 - 1024
Neurspe:
https://ideadigitalasset.com/DAMRoot/Original/10035/11237_ID-SPE-v1-ID-SPE-v1-Flat_Phillips_Self_Tap.pdf
Order Minimum Imperial:
100
Order Minimum Uom Imperial:
JR
Pack Type:
Jar
Phillips Recess Depth:
0.11
Phillips Recess Diameter:
0.182
Phillips Recess Width:
0.03
Product Family:
Electrical Supplies
Product Group:
Fasteners
Product Height:
2.15 in
Product Length:
3 in
Product Weight:
0.46 lbs
Product Width:
3 in
Protrusion Gaging Diameter:
0.023 - 0.039 Above
Screw Point Type:
Gimlet Point
Sub Division:
Electrical-E H2
Thread Per Inch:
15
Thread Standard:
ASME B18.6.4
Torsional Strength:
39 lb-in minimum
Department:
Electrical
Product Subgroup:
Screws
Product Type:
Type A Tapping Screw
Type2:
Type A Tapping Screw
Series:
JTSF
Product Finish:
Zinc
Product Details:
Type A Tapping Screw
Product Material:
Steel Zinc

Metallics JTSF21 – Frequently Asked Questions

1) Will a flat head tapping screw sit flush in a countersunk hole in a device box or plate?
Yes, that is what the flat head is for. The head on the JTSF21 runs 0.285 to 0.312 inch across and 0.084 to 0.1 inch high, so it seats down into a countersunk or dimpled hole and finishes flush. If your hole is not countersunk, the head will stand proud and you want a pan or hex washer head instead.
2) Can I use the JTSF21 on a Buy American or ARRA funded job?
No. The JTSF21 is not Buy American compliant and is not ARRA compliant, with country of origin listed as multiple. For federally funded work with domestic sourcing requirements you need a different fastener.
3) What size Phillips bit do I need to drive these #8 flat head tapping screws?
A #2 Phillips bit. The recess on the JTSF21 measures 0.182 inch diameter and 0.11 inch deep, which is standard #2 geometry, so a worn or undersized bit will cam out before you reach the 39 lb-in minimum torsional strength the screw is rated to take.
4) How many screws come in a jar of Metallics JTSF21?
They ship 100 to a jar, and 100 is the minimum order. The jar weighs 0.46 lbs.
5) Do these Metallics tapping screws meet a recognized dimensional spec for submittals?
The JTSF21 is made to ASME B18.6.4-1998 for dimensions and ASME B18.6.4 for threads, from AISI 1016 to 1024 steel, case hardened to Rockwell C28-38. Those are the values to put on a submittal. Note that #9 diameter screws in the same family fall outside B18.6.4, but the #8 does not.
6) What pilot hole should I drill for a #8 Type A tapping screw?
Size the pilot off the gaging diameter, which is 0.267 inch on the JTSF21, with protrusion gaging 0.023 to 0.039 inch above. In sheet metal the drilled or punched hole runs under the thread crest so the gimlet point can start and the 15 TPI thread cuts its own mating thread. Too large a hole and the screw spins without holding; too small and you risk snapping the head off before 39 lb-in.
7) Are zinc plated steel tapping screws OK outdoors or in a damp location?
The finish on the JTSF21 is zinc plating over steel, which is a general indoor and dry location finish. For wet, coastal, or corrosive environments, step up to a stainless or hot dip galvanized fastener instead.
8) How much material can a 1 inch tapping screw fasten through?
Overall length on the JTSF21 is 1 inch, measured from the top of the flat head down since flat heads are countersunk. Allow enough thread past the far side of the metal for the gimlet point to start and engage, so the practical grip is somewhat less than the full inch.
9) Can I get this Metallics flat head Phillips tapping screw in other lengths or diameters?
The JTSF21 itself is the #8 x 1 inch in the JTSF series, packed 100 per jar. Other sizes and quantities in the same flat head Phillips tapping screw line are available by request.
How fast can I get the Metallics JTSF21 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 JTSF21 come with a warranty?
Absolutely. The Metallics JTSF21 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 JTSF21?
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 JTSF21 from ZenSupply?
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