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Datasheet. 991 4978 specification
A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.
3b
The direction of the thread when viewed axially. a right-hand thread winds in a clockwise direction while a left-hand thread winds in a counterclockwise direction.
RIGHT-Hand
The national stock number or the identification information of the end equipment for which the item is a part.
hemtt family (heavy expanded mobility tactical trucks) ; 2320-01-097-0260 hiab crane (hemtt)
A designation indicating the diameter-pitch combination and the number of threads per measurement scale applied to a series of diameters.
unc
The number of threads on the item per linear inch measured on a line parallel to the thread axis.
9
A designation that is used for the purpose of general identification of the thread.
0.875in. ⁓7/8"
Answers.
1EA
9
Right-hand
3b
FSC 5310 ⁓ Nuts and washers
Note-nuts and washers, including specially designed, are to be classified in this fsc. a. nuts are a small metal block made in a variety of shapes such as square and hexagonal which is drilled and internally threaded. b. washers are a perforated piece of metal, leather, or other materials of various shapes or forms. they are used primarily as a seat for a bolt, nut, screw, rivet or nail to distribute pressure and prevent endwise motion over an area and/or to prevent movement between two parts by means of restraining features created by the shape of its edges.
Excluding bearing thrust washers (fsc 3120); shims (fsc 5365); ring spacers (fsc 5365); plate spacers (fsc 5365); lock rings (fsc 5365).
NSN 5310-01-213-4161 NUT,PLAIN,HEXAGON
Used on hemtt family (heavy expanded mobility tactical trucks); 2320-01-097-0260 hiab crane (hemtt). 9 thread quantity per inch right-hand 3b thread class
- NIIN
- 012134161
- NIIN Date
- 07/26/85
- Schedule B
- Name Code
- 01857
- FIIG
- A021A0
- Item Weight
- 0.200lbs
- Item Dimensions
- --
- QUP
- 1
- Historical Price
- $20.98 EA
- DEMIL / ITAR
- Uncontrolled item (Code A)
- Hazmat
- No hazard information available from HMIRS.
- MSDS
- N/A
- Precious Metals
- No precious metals
- Enviromental
- N/A
- Electrostatic ESD & EMI
- No ESD or EMI sensitivity
Other Part Numbers Parts with same form, fit, and function by other manufacturers
| 1. | 3999024 | Cage 45152 |
| 2. | 3999024 | Cage 75Q65 |
Major End Users Countries and entities
- - Department of The Army
- - Greece
Availability for 991 4978 A member of our team will provide you with a price and availability quote
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- Special Handling
- Other or no special handling required (sh)
- LTL (less than a truck load rating)
- Rating variable
- LCL (less than a car load rating)
- Unknown
- Special Cargo
- No special type of cargo code applicable
- Air Freight (Minimum cargo door size required)
- Shipment is not a consolidation and does not exceed 84 inches in any dimension.
- Customs Requirement Classification
- Construction materials: includes paint and related materials, prefabricated building, wood products, metal and composition mater
- Commodity (for shipments via water)
- Metal and metal products, nos, (less than 35 feet)
- NMFC (national motor freight code)
- 093486 BOLTS,NUTS OR SCREWS, NOI (SUB 3)
- UFC (universal freight code)
- 48950
Similar by Design Other nuts with similar characteristics
Nothing similar to this part number was found in our inventory
991 4978 / Nut,plain,hexagonWhat is the formal definition of this item?
A nut, flat on top and bottom having 6 flat sides. for items which have internal tapered or straight (parallel) pipe threads, specific electrical conduit size designation, and which when installed, provide a method of tightening to lock the connection, see locknut, electrical conduit. see also locknut, tube fitting. for items having a thickness (or height) exceeding two times the width across the flats, use post, electrical-mechanical equipment. (when height or thickness and/or width across the flats is designated as a tolerance dimension, the maximum dimension will be used to determine compliance.)
