PartsTable
Technical Data Sheet
Download PDF

A990 — EYELET,METALLIC

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

A990: EYELET,METALLIC.

The EYELET,METALLIC is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, barrel_style: STRAIGHT ROUND TYPE, flange_style: FLANGE, barrel_height: 0.074 INCHES NOMINAL IN, barrel_outside_diameter: 0.115 INCHES NOMINAL IN, flange_outside_diameter: 0.183 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5310-00-737-1204, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
A990
NSN: 5310-00-737-1204
NIINs: 007371204, 009004642
FSC: 5310 — Nuts and Washers
CAGE: 34623 — AM GENERAL LLC (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
barrel_styleSTRAIGHT ROUND TYPE
flange_styleFLANGE
barrel_height0.074 INCHES NOMINAL IN
barrel_outside_diameter0.115 INCHES NOMINAL IN
flange_outside_diameter0.183 INCHES NOMINAL IN
NSN5310-00-737-1204
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: A990 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
INTERNAL STRAIGHT KEY WIDTH: 0.135 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN
•
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY: 0.570 INCHES MINIMUM AND 0.575 INCHES MAXIMUM IN
•
HARDNESS RATING: 40.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
•
STYLE DESIGNATOR: KEY
•
OUTSIDE DIAMETER: 1.812 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.110 INCHES MINIMUM AND 0.114 INCHES MAXIMUM IN
•
MATERIAL: STEEL OVERALL
•
INTERNAL KEY QUANTITY: 2
TECHNICAL CHARACTERISTICS
INTERNAL STRAIGHT KEY WIDTH0.135 INCHES MINIMUM AND 0.145 INCHES MAXIMUM IN
DISTANCE FROM CENTERLINE TO TOP OF INTERNAL KEY0.570 INCHES MINIMUM AND 0.575 INCHES MAXIMUM IN
HARDNESS RATING40.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM
STYLE DESIGNATORKEY
OUTSIDE DIAMETER1.812 INCHES NOMINAL IN
MATERIAL THICKNESS0.110 INCHES MINIMUM AND 0.114 INCHES MAXIMUM IN
MATERIALSTEEL OVERALL
INTERNAL KEY QUANTITY2
HOLE DIAMETER1.406 INCHES NOMINAL IN
SUBSTITUTES & CROSS-REFERENCES 5
7371204Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
J2-30Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
R20882Reference document
Same NSN cross-reference
Reference document — Secondary reference
GP7771Reference document
Same NSN cross-reference
Reference document — Secondary reference
710WSame NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
Ready to buy A990?
Compare prices from verified sellers on eBay
Buy on eBay →
As an eBay Partner, PartsTable may earn a commission. Your price is not affected.
FREQUENTLY ASKED QUESTIONS
What is A990?
A990 is a EYELET,METALLIC.
What parts can replace A990?
There are 5 known substitutes for A990: 7371204, J2-30, R20882 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for A990?
A990 is cataloged in the U.S. Government catalog under NSN 5310-00-737-1204. This indicates validated use in U.S. government and defense supply chains.
Community Feedback
Leave a Comment
Comments are reviewed before appearing. You will receive an email to verify before your comment appears.

Request a Quote — A990

✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.