# DIBBS #SPE4A6-26-U-4425

DLA Solicitation for Flat Washers (NSN 5310-00-044-1645) – Indefinite Delivery Contract

**Posted:** September 28, 2026
**Respond By:** October 13, 2026
**Identifier:** SPE4A6-26-U-4425
**NAICS:** 332722

This opportunity from the Defense Logistics Agency (DLA) Aviation ASC Commodities Division seeks suppliers for flat washers under an indefinite delivery contract.
- Government Buyer:
  - Defense Logistics Agency (DLA) Aviation ASC Commodities Division, Richmond, VA
  - Buyer: Heather Spadaro
- OEMs and Approved Sources:
  - Ontic Engineering & Manufacturing (part number 543144)
  - Hamilton Sundstrand Corporation (part number 543144)
- Products Requested:
  - Washer, Flat (NSN 5310-00-044-1645 / 5310-00-441-645)
    - Part number: 543144
    - Quantity: Estimated annual quantity of 311 units; guaranteed minimum of 31 units; minimum delivery order quantity of 77 units
- Notable Requirements:
  - Packaging must comply with ASTM D3951 and MIL-STD-129
  - Quality sampling per MIL-STD-1916 or ASQ H1331
  - Critical application item; no shelf life requirement
  - Delivery lead time: 146 days, FOB origin
  - Prohibition on covered defense telecommunications equipment
  - Contract maximum value: $350,000
  - Indefinite delivery contract allows multiple delivery orders within one year
- Purchase request number: 1000243340
- Solicitation posted on DIBBS portal

### Description

WASHER, FLAT (QTY: 311, NSN: 5310-00-044-1645, Purchase Request: 1000243340)
  Approved Sources:
  - CAGE: 45934, Part No: 543144, Company: ONTIC ENGINEERING & MANUFACTURING,
  - CAGE: 73030, Part No: 543144, Company: HAMILTON SUNDSTRAND CORPORATION
 

[View original listing](https://www.dibbs.bsm.dla.mil/rfq/rfqrec.aspx?sn=SPE4A626U4425)