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WA31A — PIN,STRAIGHT,HEADLESS

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

WA31A: PIN,STRAIGHT,HEADLESS.

The PIN,STRAIGHT,HEADLESS is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, first_end_style: SQUARE, surface_treatment: OXIDE AND CHROMATE OVERALL, pin_overall_length: 4.750 INCHES NOMINAL IN, first_hole_diameter: 0.281 INCHES NOMINAL IN, pin_overall_diameter: 0.7500 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5315-00-237-0710, 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
WA31A
NSN: 5315-00-237-0710
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 79410 — LIBERTY VENTURES INTI, LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
first_end_styleSQUARE
surface_treatmentOXIDE AND CHROMATE OVERALL
pin_overall_length4.750 INCHES NOMINAL IN
first_hole_diameter0.281 INCHES NOMINAL IN
pin_overall_diameter0.7500 INCHES NOMINAL IN
hole_arrangement_styleONE END DRILLED
second_end_relationship_with_first_endIDENTICAL
distance_from_centerline_of_hole_to_end_of_pin0.188 INCHES NOMINAL IN
NSN5315-00-237-0710
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: WA31A · 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
•
HOLE ARRANGEMENT STYLE: ONE END DRILLED
•
FIRST END STYLE: SQUARE
•
FIRST HOLE DIAMETER: 0.281 INCHES NOMINAL IN
•
PIN OVERALL DIAMETER: 0.7500 INCHES NOMINAL IN
•
PIN OVERALL LENGTH: 4.750 INCHES NOMINAL IN
•
SECOND END RELATIONSHIP WITH FIRST END: IDENTICAL
•
SURFACE TREATMENT: OXIDE AND CHROMATE OVERALL
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
HOLE ARRANGEMENT STYLEONE END DRILLED
FIRST END STYLESQUARE
FIRST HOLE DIAMETER0.281 INCHES NOMINAL IN
PIN OVERALL DIAMETER0.7500 INCHES NOMINAL IN
PIN OVERALL LENGTH4.750 INCHES NOMINAL IN
SECOND END RELATIONSHIP WITH FIRST ENDIDENTICAL
SURFACE TREATMENTOXIDE AND CHROMATE OVERALL
MATERIALSTEEL OVERALL
DISTANCE FROM CENTERLINE OF HOLE TO END OF PIN0.188 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5315 — Nails, Machine Keys, and Pins
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5315-00-000-1037 5315-00-000-1067 5315-00-000-1245 5315-00-000-1372 5315-00-000-1412 5315-00-001-1571 5315-00-001-1572 5315-00-001-1602
SUBSTITUTES & CROSS-REFERENCES 2
4906406Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
4906406-6Same 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
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FREQUENTLY ASKED QUESTIONS
What is WA31A?
WA31A is a PIN,STRAIGHT,HEADLESS.
What parts can replace WA31A?
There are 2 known substitutes for WA31A: 4906406, 4906406-6. Substitute compatibility should be verified for your specific system.
What is the NSN for WA31A?
WA31A is cataloged in the U.S. Government catalog under NSN 5315-00-237-0710. This indicates validated use in U.S. government and defense supply chains.
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✓ 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.