NSN catalog · 90,963 partsCatalog › Hardware and Abrasives › FSC 5310 › 5310-00-556-6821
Self-Locking Extended Washer Nut P/N BACN10HY3M
In stock — 10 on our U.S. shelfNSN 5310-00-556-6821 5310005566821 NIIN 005566821
SECO Parts has 10 in stock of NSN 5310-00-556-6821 — Self-Locking Extended Washer Nut — 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
- NUT,SELF-LOCKING,EXTENDED WASHER
- SECO description
- NUT
- 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:
5310-00-556-6821 005566821 BACN10HY3M 69233SBD TLN1001W3 HW29872 RMLH9073
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
- Thread quantity per inch
- 32
- Thread direction
- Right-Hand
- Washer outside diameter
- 0.380 in maximum
- Counterbore diameter
- Nut Inches Minimum 0.211 and Inches Maximum 0.221
- Lubrication
- Dry Film Lubricant
- Overall height
- 0.223–0.243 in
- Material document and classification
- Nut Assn STD 1ST Material Response AISI1040 or Assn STD 2ND Material Response AISI1042 or Assn STD 3RD Material Response AISI1050
- Material document and classification
- Washer Assn STD Single Material Response A-S6322 or MIL Spec Single Material Response -IL-S-6049 CO- 8740
- Surface treatment
- Nut Cadmium
- Surface treatment
- Washer Cadmium
- Surface treatment document and classification
- Nut Fed Spec Single Treatment Response QQ--416
- Surface treatment document and classification
- Washer Fed Spec Single Treatment Response QQ--416 TYE2,CLASS3
- Locking feature
- Prevailing Torque All Metal Design
- Thread class
- 3B
- Nut counterbore depth
- Nut Inches Minimum 0.072 and Inches Maximum 0.087
- Width across flats
- 0.213–0.221 in
- Nominal thread size
- Inches 0.190
- Material
- Nut Steel Comp 1040 or Steel Comp 1042 or Steel Comp 1050
- Washer thickness
- 0.072–0.087 in
- Hardness rating
- Rockwell C Minimum 35.0 and Rockwell C Maximum 40.0
- Material
- Washer Steel Comp 8740
- Thread series
- Unified National Joint Fine (Unjf)
- Temp rating
- Fahrenheit Nominal 450.0
From the federal catalog's item characteristics for this NSN. Confirm critical dimensions against your part or drawing before ordering.
Cross-reference part numbers
BACN10HY3M 69233SBD TLN1001W3 HW29872 RMLH9073
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 5310-00-556-6821?
NSN 5310-00-556-6821 (5310005566821) — Self-Locking Extended Washer Nut: SECO Parts has 10 in stock in Augusta, GA, on our own shelf. It is the NATO Stock Number for self-locking extended washer nut in federal supply class 5310 (Nuts and Washers).
Is NSN 5310-00-556-6821 available?
SECO Parts has 10 in stock in Augusta, GA — order or request a quote below.
How much does NSN 5310-00-556-6821 cost?
NSN 5310-00-556-6821 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 5310-00-556-6821?
Part numbers that cross-reference this NSN include BACN10HY3M, 69233SBD, TLN1001W3, HW29872, RMLH9073. SECO can quote against any of them.
Same item, other stock numbers
Other NSNs the federal catalog names NUT,SELF-LOCKING,EXTENDED WASHER. Same name is not the same part: check the part numbers.