PartsTable
Technical Data Sheet
Download PDF

30179R1 — WASHER,FLAT

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

30179R1: WASHER,FLAT.

The WASHER,FLAT is a the manufacturer industrial component. Key specifications include thickness: 4.0 MILLIMETERS NOMINAL MM, hole_diameter: 21.8 MILLIMETERS NOMINAL MM, overall_diameter: 37.0 MILLIMETERS NOMINAL MM, special_features: SIZE: 20, WAHSER TYPE B, FINISH: PHC, MAT: HTS, peripheral_shape_style: ROUND, part_name_assigned_by_controlling_agency: WASHER. This part is cataloged in the U.S.

Government catalog under NSN 5310-01-620-5948, 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
30179R1
NSN: 5310-01-620-5948
FSC: 5310 — Nuts and Washers
CAGE: 338X5 — ND DEFENSE LLC (USA)
SPECIFICATIONS
thickness4.0 MILLIMETERS NOMINAL MM
hole_diameter21.8 MILLIMETERS NOMINAL MM
overall_diameter37.0 MILLIMETERS NOMINAL MM
special_featuresSIZE: 20, WAHSER TYPE B, FINISH: PHC, MAT: HTS
peripheral_shape_styleROUND
part_name_assigned_by_controlling_agencyWASHER
NSN5310-01-620-5948
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 30179R1 · 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
•
OVERALL DIAMETER: 37.0 MILLIMETERS NOMINAL MM
•
PERIPHERAL SHAPE STYLE: ROUND
•
HOLE DIAMETER: 21.8 MILLIMETERS NOMINAL MM
•
THICKNESS: 4.0 MILLIMETERS NOMINAL MM
TECHNICAL CHARACTERISTICS
OVERALL DIAMETER37.0 MILLIMETERS NOMINAL MM
SPECIAL FEATURESSIZE: 20, WAHSER TYPE B, FINISH: PHC, MAT: HTS
PERIPHERAL SHAPE STYLEROUND
PART NAME ASSIGNED BY CONTROLLING AGENCYWASHER
HOLE DIAMETER21.8 MILLIMETERS NOMINAL MM
THICKNESS4.0 MILLIMETERS NOMINAL MM
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
Ready to buy 30179R1?
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 30179R1?
30179R1 is a WASHER,FLAT.
What is the NSN for 30179R1?
30179R1 is cataloged in the U.S. Government catalog under NSN 5310-01-620-5948. 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 — 30179R1

✓ 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.