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70-2901686-1 — WASHER,LOCK

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

70-2901686-1: WASHER,LOCK.

The WASHER,LOCK is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, hole_diameter: 0.320 INCHES NOMINAL IN, hardness_rating: 44.0 ROCKWELL C NOMINAL, outside_diameter: 0.607 INCHES NOMINAL IN, style_designator: FLAT INTERNAL TEETH, surface_treatment: ZINC OVERALL. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-683-0609, 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
70-2901686-1
NSN: 5310-01-683-0609
FSC: 5310 — Nuts and Washers
CAGE: 67032 — GENERAL DYNAMICS MISSION SYSTEMS, INC. (USA)
SPECIFICATIONS
materialSTEEL OVERALL
hole_diameter0.320 INCHES NOMINAL IN
hardness_rating44.0 ROCKWELL C NOMINAL
outside_diameter0.607 INCHES NOMINAL IN
style_designatorFLAT INTERNAL TEETH
surface_treatmentZINC OVERALL
material_thickness0.040 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN
end_item_identification01-572-8269
part_name_assigned_by_controlling_agencyWASHER, LOCK-INTERNAL TOOTH
NSN5310-01-683-0609
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 70-2901686-1 · 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
•
HARDNESS RATING: 44.0 ROCKWELL C NOMINAL
•
STYLE DESIGNATOR: FLAT INTERNAL TEETH
•
OUTSIDE DIAMETER: 0.607 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.040 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN
•
SURFACE TREATMENT: ZINC OVERALL
•
MATERIAL: STEEL OVERALL
TECHNICAL CHARACTERISTICS
HARDNESS RATING44.0 ROCKWELL C NOMINAL
STYLE DESIGNATORFLAT INTERNAL TEETH
OUTSIDE DIAMETER0.607 INCHES NOMINAL IN
MATERIAL THICKNESS0.040 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN
SURFACE TREATMENTZINC OVERALL
PART NAME ASSIGNED BY CONTROLLING AGENCYWASHER, LOCK-INTERNAL TOOTH
END ITEM IDENTIFICATION01-572-8269
MATERIALSTEEL OVERALL
HOLE DIAMETER0.320 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5310 — Nuts and Washers
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5310-00-000-0040 5310-00-000-0077 5310-00-000-0079 5310-00-000-1146 5310-00-000-3815 5310-00-000-4532 5310-00-000-4540
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

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 70-2901686-1?
70-2901686-1 is a WASHER,LOCK.
What is the NSN for 70-2901686-1?
70-2901686-1 is cataloged in the U.S. Government catalog under NSN 5310-01-683-0609. 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.