NSN catalog · 90,963 partsCatalog › Hardware and Abrasives › FSC 5310 › 5310-00-877-9577
Key Washer P/N MS21258C55
In stock — 10 on our U.S. shelfNSN 5310-00-877-9577 5310008779577 NIIN 008779577
SECO Parts has 10 in stock of NSN 5310-00-877-9577 — Key Washer — on our own shelf in Augusta, GA: a stocking supplier, not a broker. Low-cost part: quoted by the line, $50 minimum per line; quantity pricing on request.
One part, one step — answered within one business day. Several parts? and send them together.
- Ships in 1–3 business days from Augusta, GA
- Certificate of Conformance on request
- PO, GPC & major cards
- $50 minimum order — smaller requests still get a quote
- 30-day returns · terms
- FLIS item name
- WASHER,KEY
- SECO description
- WASHER
- Federal supply class
- FSC 5310 — Nuts and Washers
Availability & condition
| Condition | Code | Qty on shelf |
|---|---|---|
| New Surplus | NS | 10 |
| Total | 10 |
Quantities are live from SECO's inventory system, not estimated.
Also known as:
5310-00-877-9577 008779577 MS21258C55 AN7503-55
Get a quote
Build a list across as many parts as you need, send it once, get one quote back — answered within one business day, usually the same day. POs and GPC welcome. $50 minimum order.
More to tell us? Need-by date, ship-to, your own RFQ document
Specifications
- Outside diameter
- 4.720–4.780 in
- Hole diameter
- 3.443–3.453 in
- Surface treatment
- Overall Cadmium and Chromate
- Surface treatment document and classification
- Overall Fed Spec Single Treatment Response QQ--416,TY 2,CL 3
- Material document and classification
- Overall Assn STD All Material Responses Ast- A108
- Material
- Overall Steel Comp 1018 or Steel Comp 1020 or Steel Comp 1025
- Material thickness
- 0.120–0.130 in
- Internal straight key width
- 0.271–0.291 in
- Distance from centerline to top of internal key
- 1.552–1.562 in
- Internal key quantity
- 1
From the federal catalog's item characteristics for this NSN. Confirm critical dimensions against your part or drawing before ordering.
Cross-reference part numbers
MS21258C55 AN7503-55
Shown for identification only. SECO can quote against any of these numbers.
Logistics data
| Source of supply | SMS DLA Land and Maritime, Columbus, Ohio |
| Acquisition advice code | Z Insurance/numeric stockage objective — held by the government as insurance stock for contingencies, not for routine issue. SECO has 10 on the shelf |
| Unit of issue | EA each |
| Demilitarization code | A Demilitarization not required — non-munitions-list item |
| Controlled inventory code | U Unclassified |
| Hazardous material indicator | N No hazardous material |
Source: public FLIS/PUB LOG cataloging data.
Why buy from SECO
These quantities sit on our own shelves — we are a stocking supplier, not a broker sourcing after you order. Condition-coded stock, formal quotes with NSN/PN on the paperwork, POs and GPC welcome, fast U.S. shipping.
In business since 1951 · 30,000+ contracts completed · about SECO & our policies · more questions answered
FAQ
What is NSN 5310-00-877-9577?
NSN 5310-00-877-9577 (5310008779577) — Key Washer: SECO Parts has 10 in stock in Augusta, GA, on our own shelf. It is the NATO Stock Number for key washer in federal supply class 5310 (Nuts and Washers).
Is NSN 5310-00-877-9577 available?
SECO Parts has 10 in stock in Augusta, GA — order or request a quote below.
How much does NSN 5310-00-877-9577 cost?
NSN 5310-00-877-9577 is a low-cost part, so SECO quotes it by the line rather than by the piece: there is a $50 minimum per line, and quantity pricing on request — usually answered the same business day.
What part numbers cross-reference to NSN 5310-00-877-9577?
Part numbers that cross-reference this NSN include MS21258C55, AN7503-55. SECO can quote against any of them.
Same item, other stock numbers
Other NSNs the federal catalog names WASHER,KEY. Same name is not the same part: check the part numbers.