The Washer,flat, cataloged under National Stock Number 5310-01-645-9840, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Mcnally Industries, Llc. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-645-9840 |
| Primary Part Number | 900004 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — No Item Name Available |
| Manufacturer | Mcnally Industries, Llc |
| Status | ACTIVE |
| Material Document and Classification | ASTM F436 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Hole Diameter | 0.331 INCHES MINIMUM AND 0.346 INCHES MAXIMUM IN |
| Thickness | 0.11 INCHES MINIMUM AND 0.13 INCHES MAXIMUM IN |
| Overall Diameter | 0.738 INCHES MINIMUM AND 0.768 INCHES MAXIMUM IN |
| Peripheral Shape Style | ROUND |
| Center Hole Shape Style | ROUND |
| Cross-Sectional Shape Style | RECTANGULAR |
| Hardness Rating | 38.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM |
| Surface Treatment | PHOSPHATE AND ZINC OVERALL |
| Surface Treatment Document and Classification | TT-C-490, TYPE 1 FED SPEC ALL TREATMENT RESPONSES OVERALL |
| Material | STEEL OVERALL |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 5310-01-645-9840 is a Washer,flat, manufactured by Mcnally Industries, Llc, classified under FSC 5310 (No Item Name Available). Status: active.
NSN 5310-01-645-9840 has 2 cross-referenced part numbers: 12446435 (U S Army Tank Automotive Command Amsta-Im-Mm), 900004 (Mcnally Industries, Llc).
There are 8 known substitutes for 5310-01-645-9840: 5945-00-949-7346, 5915-01-265-3529, 6625-01-310-3256 and 5 more. Verify interchangeability with system specifications before substitution.
Key specifications for 900004: Material Document and Classification: ASTM F436 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; Hole Diameter: 0.331 INCHES MINIMUM AND 0.346 INCHES MAXIMUM IN; End Item Identification: 2520-01-626-5061; Thickness: 0.11 INCHES MINIMUM AND 0.13 INCHES MAXIMUM IN. 13 total characteristics are documented in the Federal Logistics Information System.