NSN catalog · 90,963 partsCatalog › Hardware and Abrasives › FSC 5306 › 5306-00-639-1779
Internal Wrenching Bolt P/N MS20005H21
In stock — 2 on our U.S. shelfNSN 5306-00-639-1779 5306006391779 NIIN 006391779
SECO Parts has 2 in stock of NSN 5306-00-639-1779 — Internal Wrenching Bolt — 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
- BOLT,INTERNAL WRENCHING
- SECO description
- BOLT
- Federal supply class
- FSC 5306 — Bolts
Availability & condition
| Condition | Code | Qty on shelf |
|---|---|---|
| New Surplus | NS | 2 |
| Total | 2 |
Quantities are live from SECO's inventory system, not estimated.
Also known as:
5306-00-639-1779 006391779 MS20005H21 MS20005-21
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
- Nominal thread diameter
- Inches 0.312
- Width across flats
- 0.219–0.221 in
- Surface treatment
- Overall Cadmium and Chromate
- Surface treatment document and classification
- Overall Fed Spec Single Treatment Response QQ--416, Tye II, Class 2
- Hardness rating
- Overall Rockwell C Minimum 34.0 and Rockwell C Maximum 40.0
- Material
- Overall Steel Comp 4140 or Steel Comp E4340 or Steel Comp 6150 or Steel Comp 8735 or Steel Comp 8740
- Material document and classification
- Overall MIL Spec 1ST Material Response -IL-S-5626 or MIL Spec 2ND Material Response -IL-S-5000 or MIL Spec 3RD Material Response -IL-S-8503 or MIL Spec 4TH Material Response -IL-S-6098 or MIL Spec 5TH Material Response -IL-S-6049
- Thread length
- 0.537–0.587 in
- Fastener length
- 1.860–1.890 in
- Thread class
- 3A
- Head diameter
- 0.521–0.531 in
- Head height
- 0.312 in (nominal)
- Hole diameter
- 0.055 in (nominal)
- Minimum tensile strength
- Pounds Per Square Inch 160000
- Thread direction
- Right-Hand
- Thread quantity per inch
- 24
- Hole quantity
- 4
- Hole type
- Drilled
- Thread series designator
- UNF
From the federal catalog's item characteristics for this NSN. Confirm critical dimensions against your part or drawing before ordering.
Cross-reference part numbers
MS20005H21 MS20005-21
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 2 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 5306-00-639-1779?
NSN 5306-00-639-1779 (5306006391779) — Internal Wrenching Bolt: SECO Parts has 2 in stock in Augusta, GA, on our own shelf. It is the NATO Stock Number for internal wrenching bolt in federal supply class 5306 (Bolts).
Is NSN 5306-00-639-1779 available?
SECO Parts has 2 in stock in Augusta, GA — order or request a quote below.
How much does NSN 5306-00-639-1779 cost?
NSN 5306-00-639-1779 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 5306-00-639-1779?
Part numbers that cross-reference this NSN include MS20005H21, MS20005-21. SECO can quote against any of them.
Same item, other stock numbers
Other NSNs the federal catalog names BOLT,INTERNAL WRENCHING. Same name is not the same part: check the part numbers.